Modulating Gas Valve with Coaxial Control and Main Valves
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Solution Overview
Problem
Existing gas valves lack efficient flow control and pressure modulation, particularly in gas-fed appliances, where they often rely on simple on-off mechanisms rather than nuanced control.
Innovation Solution
A modulating gas valve design featuring a main valve and a control valve, where the control valve is coaxially aligned and independently actuable, allowing for finer pressure control and faster response times due to its lighter weight, and can be overridden by the main valve for shut-off functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple on-off gas valve mechanism is used, then the device complexity is reduced, but the flow control precision and pressure modulation capability deteriorate
Solution Approach 1:
The gas valve is segmented into two independent valves: a main valve for shut-off functionality and a control valve for flow modulation. This segmentation allows each valve to be optimized for its specific function, with the control valve providing precise pressure control while the main valve handles the on-off operation, thereby resolving the contradiction between device complexity and control precision.
2Reliability
If a heavier main valve is used for shut-off functionality, then the shut-off reliability is improved, but the response time deteriorates
Solution Approach 1:
The valve system is divided into a main valve and a control valve, where the control valve is specifically designed with lighter weight for faster response time while the main valve provides the necessary shut-off reliability. This segmentation resolves the contradiction by assigning different functional priorities to separate components.
Solution Approach 2:
The control valve is designed to be dynamically responsive with lighter construction for rapid modulation, while the main valve maintains heavier construction for reliable shut-off. The system dynamically switches between the two valves based on operational requirements, resolving the contradiction between reliability and speed.
3Device complexity
If a single valve is used for both shut-off and flow control, then the device complexity is reduced, but the flow control precision deteriorates
Solution Approach 1:
The valve system is segmented into a main valve for shut-off and a control valve for precise flow control. The control valve's lighter construction enables finer pressure control and more precise flow modulation, resolving the contradiction between structural simplicity and control precision.
Solution Approach 2:
While the system uses two separate valves, they work together as a unified multi-functional system where the main valve provides shut-off capability and the control valve provides flow modulation, achieving universal functionality that resolves the contradiction between simple structure and precise control.
Data Source
AI summary
A gas valve may include a valve body defining an upper valve seat region, and in some cases a lower valve seat region. A main valve that includes an upper main plate, and in some cases a lower main plate, may be disposed within the valve body. A control valve that includes an upper control plate, and in some cases, a lower control plate may be coaxially aligned with the main valve. The main valve may provide shut-off functionality while the control valve may provide flow control.